Jack up workover rig with removable workover floor unit

Details Jack up workover rig with removable workover floor unit Jack up workover rig with removable workover floor unit

2005-08-09

2005-08-09

Walker, Zakiya (Department: 3672)

Boring or penetrating the earth

Boring a submerged formation

Boring from nonbuoyant support

C166S343000, C405S196000

Reexamination Certificate

active

06926097

ABSTRACT:
An offshore jack-up workover rig. The workover rig includes a vessel which may be self powered or powered by a tug. The vessel may be raised above the surface of a water body by extending the legs until they reach the water body bed and then continuing to extend the legs. The workover rig contains a workover floor unit which includes at least a drawworks, a drawworks motor, and a well aperture. The workover rig is detachably mounted on an extensible cantilevered frame. The frame may be extended to position the workover floor unit over an offshore platform to be serviced. The workover floor unit is also configured to mover laterally relative to the extensible frame. The vessel is also provided with a crane. The crane may be used to lift the detachable workover floor unit from the vessel and deposit it, including its equipment, on the platform.

REFERENCES:
patent: 4456404 (1984-06-01), Evans
patent: 5997217 (1999-12-01), Verret
patent: 6523491 (2003-02-01), Moise, II et al.
patent: 6607331 (2003-08-01), Sanders et al.
Offshore Magazine's Editorial Schedule and Market Planner, Oct. 1, 1994.
Ocean Energy Inc.'s article entitled “Why pay for more rig than you need,” Houma, Louisiana, undated.
Houtech Energy, Inc.'s Marine Workover/Drilling Unit Brochure, Stafford, Texas, undated.
Photograph of Drilling Rig, Venezuela, undated.
Pressure Services, Inc.'s Drawing of Outboard Profile of Liftboat, Houma, Louisiana, Aug. 10, 1981.

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